Cobb Flex Fuel Ethanol Content Sensor Kit 2004-2007 STI, 2006-2007 WRX

Harness the power of ethanol, while maintaining ease of ownership and the flexibility to fuel up where and when you want. Flex Fuel is a combination of hardware and software that will allow your car to run on any mixture of gasoline and E85 fuel. The Cobb ethanol content sensor kit will deliver fuel quality information back to the ECU, where it will adjust boost, fuel, and timing parameters accordingly. It's a whole new world of high performance.

The Cobb Flex Fuel ethanol content sensor kit is a plug-and-play implementation that uses existing wiring, so no cutting or splicing is required. Utilizing COBB custom features along with this package, ethanol content values are able to be sent to the ECU and monitored via custom Accessport Monitors.

Flex Fuel implementation requires custom ECU tuning. Do not even THINK of installing this kit without custom tuning!

Note that we recommend a MINIMUM injector size of 1000cc for Flex Fuel implementation, and a fuel pump upgrade is REQUIRED. Also, we HIGHLY recommend a fuel pressure sensor kit in addition to the ethanol content sensor, for safest and most reliable implementation of flex fuel tuning. (You can find a complete kit WITH a fuel pressure sensor HERE.)

Fits all 2004-2007 STI 2006-2007 WRX. Note that 2007 STI has a special electrical plug; specify your model year.